The Los Angeles Police Department will re-open its case of firing officer Christopher Dorner after the man made allegations of racism before going on what police said was a killing spree.

Dorner is accused of killing a couple last week and shooting two more officers, killing one. He posted a manifesto to Facebook claiming that the LAPD fired him for blowing the whistle on abuse, and that the department had an atmosphere of racism and widespread use of excessive force.

Police Chief Charlie Beck said that Dorner’s accusation of racism triggered an automatic review of his firing.

“I do this not to appease a murderer. I do it to reassure the public that their police department is transparent and fair in all the things we do,” the chief said in a statement.

In his manifesto, Dorner vowed revenge against a number of officers he believed wronged him, prompting police to offer protection to dozens of individuals. One of those targets said he had not left his home in days.

“From what I’ve seen of (Dorner’s) actions, he feels he can make allegations for injustice and justify killing people and that’s not reasonable,” Capt. Phil Tingirides, who chaired a board that stripped Dorner of his badge, told The Associated Press. “The end never justifies the means.”

Christopher Dorner has gained a number of supporters online, those who see truth in his allegation that the police force operates without impunity. They say his allegation that the police operate outside the law and use force as necessary were proven last week when officers fired on a truck they believed was driven by Dorner. With no warning, as many as seven officers opened fire, injuring two Latina women inside the truck.